This monograph was written to answer questions about the essence of librarianship, the meaning of information, and the principles behind a desire for information transfer, preservation of older records, or creation of new ideas. The work is organized into three parts. Part I is titled "In Search of a Discipline: Toward a Science of Library Information (LIS)" and includes chapters 1-4. Part II is titled "Defining Library Reality: Philosophical Inquiry" and includes chapters 5-8. Part III is titled "Metalibrarianship" and includes chapters 9-12. The chapters are as follows: (1) Introduction; (2) Historical Milestones in Librarianship; (3) Changing Paradigms of Library Information Science; (4) The Issue of Library and Information Science Self-Consciousness; (5) Conceptual Framework; (6) What Is Philosophy of Librarianship? (7) Emerging Philosophy of Librarianship; (8) Theories about Knowledge; (9) Intellectual Environment of Metalibrarianship; (10) The Concepts of 'Information' and 'Knowledge' Revisited; (11) Theory of Metalibrarianship; and (12) Metalibrary Implications. A list of the major contributors to the philosophy of librarianship is appended. (Contains 413 references.) (KRN)